Lastly What would you guys consider "whole bunch of other modifications" vs just adding it to a stock motor.
(1) Camshaft with higher lift and increased duration will increase volumetric efficiency (when used with 2, 3, and 4)
(2) Better exhaust will increase volumetric efficiency
(3) Higher compression will increase volumetric efficiency
(4) Larger runners in manifolds/head will increase higher RPM volumetric efficiency (and will LOWER VE at lower RPM's)
Any/all of the above MAY allow higher RPM which will then require somewhat more carburetion; HOWEVER, higher RPM may require mods to the lower end (better rods, crank, etc.).
And any/all of the above may require more ignition.
Jon.